Lo estamos haciendo aquí para demostrar cómo **FastAPI** maneja scopes declarados en diferentes niveles.

///

{* ../../docs_src/security/tutorial005_an_py310.py hl[5,141,172] *}

/// info | Información Técnica

`Security` es en realidad una subclase de `Depends`, y tiene solo un parámetro extra que veremos más adelante.

# Test with parts from, and to verify the report in:
# https://github.com/fastapi/fastapi/discussions/14177
# Made an issue in:
# https://github.com/fastapi/fastapi/issues/14247
from enum import Enum

from fastapi import FastAPI
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, Field


class MessageEventType(str, Enum):
    alpha = "alpha"
    beta = "beta"

* <a href="https://sqlmodel.tiangolo.com/" class="external-link" target="_blank">External link</a>
* <a href="https://fastapi.tiangolo.com/css/styles.css" class="external-link" target="_blank">Link to a style</a>
* <a href="https://fastapi.tiangolo.com/js/logic.js" class="external-link" target="_blank">Link to a script</a>
* <a href="https://fastapi.tiangolo.com/img/foo.jpg" class="external-link" target="_blank">Link to an image</a>

## Adım Adım Özetleyelim

### Adım 1: `FastAPI`yı Projemize Dahil Edelim

{* ../../docs_src/first_steps/tutorial001.py hl[1] *}

`FastAPI`, API'niz için tüm işlevselliği sağlayan bir Python sınıfıdır.

/// note | Teknik Detaylar

`FastAPI` doğrudan `Starlette`'i miras alan bir sınıftır.

///

## Typhinweise in **FastAPI** { #type-hints-in-fastapi }

**FastAPI** macht sich diese Typhinweise zunutze, um mehrere Dinge zu tun.

Mit **FastAPI** deklarieren Sie Parameter mit Typhinweisen, und Sie erhalten:

* **Editorunterstützung**.
* **Typ-Prüfungen**.

... und **FastAPI** verwendet dieselben Deklarationen, um:

I consider **FastAPI** a "spiritual successor" to APIStar, while improving and increasing the features, typing system, and other parts, based on the learnings from all these previous tools.

///

## Used by **FastAPI** { #used-by-fastapi }

from typing import Optional

from fastapi import FastAPI
from fastapi.testclient import TestClient
from inline_snapshot import snapshot
from pydantic import BaseModel, computed_field


class SubItem(BaseModel):
    subname: str
    sub_description: Optional[str] = None
    tags: list[str] = []
    model_config = {"json_schema_serialization_defaults_required": True}


class Item(BaseModel):
    name: str

# Ref: https://github.com/fastapi/fastapi/issues/14454

from typing import Annotated

from fastapi import Depends, FastAPI, Security
from fastapi.security import OAuth2AuthorizationCodeBearer
from fastapi.testclient import TestClient
from inline_snapshot import snapshot

oauth2_scheme = OAuth2AuthorizationCodeBearer(
    authorizationUrl="api/oauth/authorize",
    tokenUrl="/api/oauth/token",
    scopes={"read": "Read access", "write": "Write access"},

Outros termos comuns para essa mesma ideia de "injeção de dependência" são:

* recursos
* provedores
* serviços
* injetáveis
* componentes

## Plug-ins em **FastAPI** { #fastapi-plug-ins }

これらを使って、関数を単一の`yield`でデコレートすることができます。

これは **FastAPI** が内部的に`yield`を持つ依存関係のために使用しているものです。

しかし、FastAPIの依存関係にデコレータを使う必要はありません（そして使うべきではありません）。

FastAPIが内部的にやってくれます。